Center locating device



May 16, 1944.

G. L. BEHEN CENTERLOGATING DEVICE Filed A ril 23, 1943 3 Sheets-Sheet 1lmzengfor 72 80738 L. ,Bekew WW l m May 16, 1944.

G. L. BE4HEN 2,348,878

CENTER LOCATING DEVICE Filed April 23, 1943 3 Shee'ts-Sheet 2 Inventoreafje Z. Be kev; By flzwaaisfizfi M WW tarlzeys,

G. L. BEHEN 2,348,878

CENTER LOCATING DEVICE Filed April 23, 1943 3 Sheets-Sheet 3 /I I I WWWPatented May 16, 1944 CENTER LOCATIN G DEVICE George L. Behen, Arvada,0010., assignor of onehalf to Ralph Ashton, Arvada, 0010.

Application April 23, 1943, Serial No. 484,265

1 Claim.

This invention relates to new and useful improvements in devices forlocating the centers of shafts and other structures, the principalobject of the present invention bein to provide a device of thischaracter which can be utilized in ascertaining the centers of shafts ofany cross sectional shape.

Another important object of the invention is to provide a device of thischaracter which is especially adapted for use on stock to be used inturning lathes.

Still another important object of the invention is to provide a centerlocating device which is not only accurate, but capable of being usedquickly and handily with practically no chance of erring'.

Other objects and advantages of the invention will become apparent tothe reader Of the following description.

In the drawings:

Figure 1 represents a top plan view of the instrument.

Figure 2 is a bottom plan view of the instrument.

Figure 3 is an end elevational view of the instrument.

Fi ure 4 is a side elevational view.

Figure 5 is a fragmentary detailed sectional view taken substantially onthe line 5--5 of Figure 1 and showing an ofiset scriber in use.

Figure 6 is a fragmentary detailed sectional view taken on the line 66of Figure 1.

Figure 7 is a fragmentary detailed sectional view showing a center punchwhich is used alternately with the scriber shown in Figure 5.

Figure 8 is a fragmentary top plan view showing the guide tongue on oneof the complementary angles.

Referring to the drawings wherein like numerals designate like parts, itcan be seen that the instrument is composed of a pair of right anglesquare members 5, 6 each having a pair of arms disposed at a ninetydegree angle relative to each other, and the arms of these squaremembers cross as clearly shown in both Figures 1 and 2.

As is shown in Figures 3 and 4, the arms of the square members 5, 6 areslotted longitudinally as at I, thus defining fingers 8 which interlapat the points of crossing of the arms of the square members. Further,the fingers are longie tudinall slotted as at 9 and Where the slots}! ofthe fingers of the arms of one square member cross the slots 9 of thefingers of the arms of the complementary square member, a bolt 10 isdisposed therethrough and also through a washer II which bears against aconnector bar l2, the bolt Iii passing through a slot l3 which extendslongitudinally of the connector bar l2.

Suitable graduations or other micromic reading I4 is provided along oneor both arms of the square members.

An elongated beam I5 is fixed to and projects at 45 degrees from thejuncture of the arms of the square member 5, across the juncture of thearms of the square member 6 and for some distance therebeyond. This beam15 has a longitudinal slot l6 therein for receiving a guide tongue I!which is fixed to and projects beyond the juncture of the arms of squaremember 6. A set screw I8 having a knurled head is disposed through a capplate !9 and through the slot I 6 and into the tongue ll.

Either an ofiset scriber 20 can be employed in a holder generallyreferred to by numeral 2|, or a center punch 22 may be employed.

The holder consists of a body 23 having a vertical bore therethrough,this body 23 having a depending boss 24 disposed through both the slotsl3 and it of the beam 15 and bar I2. The offset scriber 20 has a head 25and a reduced intermediate portion 26 against which is disposed a setscrew 21 which forms part of the holder.

The center punch 22 has a reduced intermediate portion 28 which can beengaged by the aforementioned set screw 2'! when this center punch 22 isused instead of the offset scriber 20.

It can now be seen, that when the two square members 5, B are forcedtogether or pulled apart, there will be a differentiation of movement ofthe bar l2 which is regulated by the action of the bolts I0, reacting inresponse to the action of the square members 5, 6 which, of course,always places the holder 2| in the exact center of the square areadefined by the two square members 5, 6.

While the foregoing specification sets forth the invention in specificterms, it is to be understood that numerous changes in the shape, sizeand materials may be resorted to without departing from the spirit andscope of the invention as claimed hereinafter.

Having described the invention, what is claimed as new is:

A center locating device comprising a pair of right angle square memberseach having a pair of arms disposed at a degree angle relative to eachother, the arms of said square members being slotted longitudinally todefine a plurality of fingers for each arm, said fingers interlapping atthe points of crossing of the arms and the of said square members, saidbeam having a longitudinally elongated slot receiving said guide tongue,a cap plate secured over the beam and to said guide tongue, and a markerincluding a body disposed on the connector bar and having a bossdisposed through the slots of the connector bar and the beam, said bodyand, boss having an axial bore, and a marking element longitudinallyadjustable in said bore and projecting from the 10 boss.

GEORGE L. BEHEN.

